The Mackie MP-BTA is a Bluetooth adapter cable with MMCX connectors for Mackies MP Series in-ear monitors, giving you the convenience of wireless freedom when you want it. The MP-BTA utilizes Bluetooth 4.0 to enable easy, reliable pairing with Bluetooth-enabled devices such as smartphones, tablets, and laptops. The in-line microphone and remote control allow you to take calls, adjust volume, and control playback without having to pull out your mobile device.